<!--
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  "availability" : [
    "macCatalyst: 14.0.0 -",
    "macOS: 10.15.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "IOUSBHost",
  "identifier" : "/documentation/IOUSBHost/IOUSBGetNextCapabilityDescriptorWithType(_:_:_:)",
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  "role" : "Function",
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    "modules" : [
      "IOUSBHost"
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    "preciseIdentifier" : "c:@F@IOUSBGetNextCapabilityDescriptorWithType"
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  "title" : "IOUSBGetNextCapabilityDescriptorWithType(_:_:_:)"
}
-->

# IOUSBGetNextCapabilityDescriptorWithType(_:_:_:)

Obtains the next descriptor matching a specific type within a BOS descriptor.

```
func IOUSBGetNextCapabilityDescriptorWithType(_ bosDescriptor: UnsafePointer<IOUSBBOSDescriptor>!, _ currentDescriptor: UnsafePointer<IOUSBDeviceCapabilityDescriptorHeader>!, _ type: UInt8) -> UnsafePointer<IOUSBDeviceCapabilityDescriptorHeader>!
```

## Parameters

`bosDescriptor`

A BOS descriptor that contains the descriptors to iterate through.

`currentDescriptor`

A descriptor pointer within the bounds of `configurationDescriptor`, or `nil`.

`type`

The descriptor type to find.

## Return Value

A device capability descriptor pointer, or `nil` if no matching descriptor returns.

## Discussion

This method uses [`IOUSBGetNextCapabilityDescriptor(_:_:)`](/documentation/IOUSBHost/IOUSBGetNextCapabilityDescriptor(_:_:)), and further validates that the returned descriptor’s `bDevCapabilityType` field matches the type parameter.

---

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